Experimental assessment of the effectiveness of recovery annealing of VVER-1000 vessels
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An experimental assessment of the effectiveness of recovery annealing of VVER-1000 vessels on the basis of mechanical tests and structural studies of control samples of the main metal and the weld-seam metal with high nickel content (>1.65%) in the No. 1 unit of the Balakovo nuclear power plant in states after primary irradiation in the control sample channels, annealing in a chosen regime, and repeat accelerated irradiation in the IR-8 research reactor to fluence corresponding to extended service to 60 yr and longer is presented. The mechanical tests and structural studies showed a high degree of recovery of the structure and properties for the chosen temperature–time regime of annealing as well as a lower rate of repeated after the recovery annealing embrittlement as compared with the rate of embrittlement with primary irradiation.
KeywordsWeld Seam Radiation Defect Primary Irradiation Main Metal Radiation Embrittlement
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- 1.L. M. Utevskii, E. E. Glikman, and G. S. Kark, Reversible Temper Brittleness of Steel and Iron Alloys, Metallurgiya, Moscow (1985).Google Scholar
- 2.Yu. A. Nikolaev, “Radiation embrittlement of Cr–Ni–Mo and Cr–Mo RPV steels,” J. ASTM Intern., 4, No. 8, 1–17 (2007).Google Scholar
- 3.S. A. Saltykov, Stoichiometric Metallography, Metallurgiya, Moscow (1976).Google Scholar
- 5.B. Z. Margolin, A. A. Nikolaev, E. V. Yurchenko, et al., “Analysis of embrittlement of VVER-1000 vessel materials during operation,” Vopr. Materialoved., No. 4(60), 108–123 (2009).Google Scholar